Evaluation of Thermoacoustic Cycles for Cooling Applications
نویسندگان
چکیده
The most promising applications for thermoacoustic cooling are investigated from the perspective of the thermodynamic second law efficiency in this paper. A design optimization program interacting with the thermoacoustic simulation program known as DELTAE was developed. Then it was applied to two of the most common configurations for standing-wave thermoacoustic coolers in order to determine the best possible second law efficiencies for various temperature spans between hot-side and cold-side stack-end temperatures. It was found that the second law efficiency of thermoacoustic coolers increases with temperature span and reaches a maximum for temperature lifts around 80 °C. Analysis of the results and the losses clearly show that from an efficiency perspective, thermoacoustics performs well for refrigeration applications but poorly for both air-conditioning and cryogenic cooling. The second law efficiencies determined from measurements for various thermoacoustic coolers developed so far show a similar trend.
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